fix: login via followees endpoint instead of /users/self/info/

- Login check uses /friendships/{ds_user_id}/following/ (works reliably)
- Store own_user_id from cookies to avoid extra API call
- Skip separate user info fetch

instagram_monitor.py

@@ -34,6 +34,7 @@ class InstagramMonitor:
         self._download_dir.mkdir(parents=True, exist_ok=True)
         self._state: dict[str, str] = self._load_state()
         self._logged_in = False
+        self._own_user_id: int = 0
 
     def _load_state(self) -> dict[str, str]:
         if self._state_file.exists():
@@ -52,7 +53,6 @@ class InstagramMonitor:
         if self._logged_in:
             return True
 
-        # Try cookies.txt
         cookies_path = None
         for candidate in [
             Path(config.download_dir) / "cookies.txt",
@@ -85,16 +85,20 @@ class InstagramMonitor:
                 return False
 
             logger.info(f"Cookies loaded: ds_user_id={ds_user_id}")
+            self._own_user_id = int(ds_user_id)
 
-            resp = self.session.get(f"{API_BASE}/users/self/info/", headers=IG_HEADERS, timeout=30)
+            # Test by fetching own followees (lightweight check)
+            resp = self.session.get(
+                f"{API_BASE}/friendships/{ds_user_id}/following/",
+                params={"count": 1},
+                timeout=30,
+            )
             if resp.status_code == 200:
-                data = resp.json()
-                username = data.get("user", {}).get("username") or data.get("username", "unknown")
-                logger.info(f"Logged in as: {username}")
+                logger.info("Login verified via followees endpoint")
                 self._logged_in = True
                 return True
             else:
-                logger.error(f"Session validation failed: {resp.status_code} {resp.text[:200]}")
+                logger.error(f"Login check failed: {resp.status_code} {resp.text[:200]}")
                 return False
 
         except Exception as e:
@@ -104,24 +108,7 @@ class InstagramMonitor:
     def _get_followees(self) -> list[dict]:
         followees = []
         max_id = None
-
-        # First get own user ID
-        try:
-            resp = self.session.get(f"{API_BASE}/users/self/info/", timeout=30)
-            if resp.status_code == 200:
-                own_user_id = resp.json().get("user", {}).get("pk") or resp.json().get("pk")
-                if own_user_id:
-                    logger.info(f"Own user ID: {own_user_id}")
-                else:
-                    logger.error("Could not get own user ID from response")
-                    logger.debug(f"Response keys: {list(resp.json().keys())}")
-                    return followees
-            else:
-                logger.error(f"Failed to get own user ID: {resp.status_code}")
-                return followees
-        except Exception as e:
-            logger.error(f"Error getting own user ID: {e}")
-            return followees
+        own_user_id = self._own_user_id
 
         while True:
             try: